Specifications include, but are not limited to: Vendors responding to the proposal are expected to: • select a sample that is representative of Collin County’s adult population; • administer the questionnaire to the sample; • generate a data file containing the collected data in SPSS, Microsoft Excel, or ASCII format; • verify the data’s accuracy; and • provide the date file and file layout information to the Collin College’s Vice President for Institutional Research. In the proposal, the vendor must provide costs for this project using three different sampling arrangements: • a representative probability sample that provides estimates of the desired population parameters at a 95 percent confidence level plus or minus 3 percent; • a representative probability sample that provides estimates of the desired population parameters at a 95 percent confidence level plus or minus 4 percent, and • a representative probability sample that provides estimates of the desired population parameters at a 95 percent confidence level plus or minus 5 percent.